Safety-envelop.



E. HEITMANN.

SAFETY ENVELOP.

APPLICATION FILED APR. 12. 1915.

2 SHEETS-SHEET I.

A TTORI/EY COLUMBIA PLANOURAPH CO.,WASHINGTON, n. c.

Patented Oct. 26, 1915.

E. HEITMANN.

SAFETY ENVELOP.

APPLICATION FILED APR. 12, 1915.

Patented Oct. 26, 1915.

2 SHEETSSHEET Z.

WITNESSES. lNl/E/VTOH Ewmsf Mei/Ma n 7 ATTORNEY COLUMBIA PLANomzm-H CQJVASHINGTDN. n, c,

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ERNEST HEITMANN, OF NEW YORK, N. Y.

SAFETY-ENVELO P.

Specification of Letters Patent.

Patented Oct. 26, 1915.

Application filed. April 12, 1915. Serial No. 20,641.

To all whom it may concern:

Be it known that T, ERNns'r HEITMANN, a citizen of the United States, and a resident of New York, in the county of Bronx and State of New York, have invented certain new and useful Improvements in Safety- Envelops, of which the following is a specification.

This invention relates to improvements in containers for mailing purposes and in particular to that type known as safety envelops.

The objects are, primarily, to provide an envelop that, after having been sealed, can not be opened except by rupture of its parts, such rupture being clearly evident to ordinary observation, indicating that the inclosure has been tampered with.

A second object is to provide an envelop for commercial purposes, and having the foregoing characteristic advantage, the cost of manufacture of which is substantially no greater than that of envelops of common construction and which can be used with equal facility.

These objects are attained by the novel constructions of parts hereinafter described and shown in the accompanying drawings, forming part of this specification, and in which Figure 1 is a plan view of the blank, looking from the inner or inclosing side, all parts being extended fiat. Fig. 2 is a similar view of the same looking from the opposite or outer side and showing the detector member. Fig. 3 is a partial sectional view, taken on line 33 of Fig. 2. Fig. 4 is a partial plan view of the blank showing some of the elements folded. Fig. 5 is a similar view showing portions further folded. Fig. 6 is a view showing the lower portion of the envelop folded into its normal position. Fig. 7 is a like view of the back of the envelop, showing the lower portion and ends folded into position for receiving inclosures, and, Fig. 8, is a view of the back of the envelop fully closed.

In the blank, which is to form the envelop, the face or front 10 may be preferably a rectangle having creases 11, 12 and 13 along its four side edges, those at the ends 12 permitting the end flaps 1 1 to fold over forming a part of the back while the rear flap 16 folds along the crease 11 below the ends. The rear flap 16 is formed with edges 17 along a portion of its width from the narrowest point of which extend outwardly arms 18, fo-ldable along the crease 19, the arms being increased in area at 20 and terminate beyond the crease 21 in wings 22, a portion of which 23, are substantially in alinement with the crease 11; the lower edge of the wings 22, which extend out into register with the end flaps 1 1-, are out at an angle 25, the same agreeing with the angle 17. The bottom flap is completed by the extending edge 26 reaching between the creases 19 from one to the other. The end flaps 14 are formed substantially rectangu-- lar, with the lower outer corner 27 removed as shown.

It will be understood that the material of the envelop is preferably of paper, having proper strength and opacity and that both ends of the blank are symmetrical and alike in contour from a median line drawn from top to bottom of the blank. Secured at its ends only, as at 28, is a detector strip of thin or so called tissue paper 30, the same having serrations 29 along its outer edge, the points being substantially in line with the edge 26 and its ends extending from the point of in tersection of the angular edges 17 and creases 19; when the bottom flap 16 is folded on the crease 11 so as to rest against the main portion 10, this strip of thin material is brought approximately to the center of the envelop and is further held in place by the end flaps 14: when they are folded over upon it along the creases 12; the thin strip, which is preferably of a bright color contrasting with that of the envelop body, at this time appears below the round perforations 32 formed through the end flaps 14 which are gummed tightly over the thin strip and lower flap, this disposition being shown in Figs. 6 and 7. The top flap 35 is formed with diagonal edges 36, extending outwardly for a certain distance to the offset 87, the angles of the edges 38 finally meeting at the apex 89, a triangular opening 40 being formed therethrough. Also through the top flap 35 are a series of slits or perforations 42 which, when the envelop is closed and gummed, assist in holding the flap in position and prevent intrusion except it be noticeable, as the cuts are so made as to form projections, easily sundered.

To those familiar with the art it will be seen that the blank can be readily cut by dies of ordinary construction and that practically no loss of material is necessitated; also that suitable adhesives may be applied to the proper places, to wit, adjacent to the edges of the top flap, a portion of the outer surface of the end flaps, at the points 28 on the opposite side and 011 the surfaces at In forming the envelop from the blank, the wings are folded on the creases 21, as at Fig. 4, then the arms on the creases 19, as indicated in Fig. 5, after which the entire bottom flap is folded on the crease 11, see

.Fig. 6, and then the end flaps fold under as 1 in Fig. 7, making the envelop ready to receive inclosures; by moistening the gunnned surfaces 23 and the surfaces adjacent to the envelop may be made of any preferred material, in any size or shape desired and that a pleasing symmetrical appearance is attained.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. A safety-envelop having end and bottom flaps, a pervious tissue fabric strip engaged at its ends between saidflaps in such manner as to have its major portion unconfined, parts being visible through openings in 'said flaps, and a cover flap having an opening through which said strip may be seen and provided with an adhesive binding said strip only where contact is made with it when the envelop is sealed.

2. A safety-envelop having perforate end flaps, a bottom flap engaged therewith, a

pervious tissue strip arranged longitudinally of the envelop below the perforations in said end flaps, normally secured at its ends only, serrations formed in one edge of strip, said serrations being unconfined and a cover flap adapted to adhere to said end and bottom flaps its adhesive penetrating and binding said strip.

3. A safety-envelop comprised of a single symmetrical blank having folded end and bottom flaps, a pervious and fragile element engaged at its ends between said end and bottom flaps at the center of said blank and a top flap having an adhesive capable of permeating said element and becoming adherent therethrough to said bottom flap.

4c. A safety-envelop having perforate end flaps, a bottom flap engaged therewith, a pervious tissue strip arranged longitudinally of the envelop below the perforation in said end flaps, normally secured at its ends only, and serrations on the edge of said strip, the strip being of a different color from the body of the envelop.

5. A safety-envelop formed of a symmetrical blank having end and bottom flap portions adherent, a top flap adapted to fold thereover, tabs formed with said bottom fia p extending above the end flaps in such manner as to fold thercover and having a portion provided with an adhesive, elements formed with but partially separated from said top flap adapted to adhere to said tabs, and a tissue fabric secured at its ends to the back of the envelop, said top flap partially overlying said fabric and having an adhesive coating uniting said fabric with the back of the envelop.

Signed at New York in the county of New York and State of New York this twentyseventh day of March A. D. 1915.

ERNEST HEITMANN.

Vitnesses LULU A. KOIILMANN, A. D. GEIER.

Copies of this patent ma} be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

